[gnome-shell/wip/fmuellner/dont-disturb: 1334/1334] calendar: Add "Do Not Disturb" switch

[Florian Müllner <fmuellner src gnome org>]

commit bb3c027ac61712ee60edb8670292a11e5f51e98f
Author: Florian Müllner <fmuellner gnome org>
Date:   Fri May 4 17:55:29 2018 +0200

    calendar: Add "Do Not Disturb" switch
    
    We've had the ability to temporarily disable notification banners
    all the way back to 3.0, but we stopped exposing it in the UI with
    the 3.16 notification redesign. With the message list being more
    concise nowadays and the "Clear" button reduced to a single icon,
    we now have space for a "Do Not Disturb" switch again.
    
    https://gitlab.gnome.org/GNOME/gnome-shell/issues/239

 .../gnome-shell-sass/widgets/_message-list.scss    |  6 ++-
 js/ui/calendar.js                                  | 48 +++++++++++++++++++++-
 2 files changed, 52 insertions(+), 2 deletions(-)
---
diff --git a/data/theme/gnome-shell-sass/widgets/_message-list.scss 
b/data/theme/gnome-shell-sass/widgets/_message-list.scss
index b0e2b491dc..b64bf0a163 100644
--- a/data/theme/gnome-shell-sass/widgets/_message-list.scss
+++ b/data/theme/gnome-shell-sass/widgets/_message-list.scss
@@ -22,9 +22,13 @@
   &:rtl {padding:0;}
 }
 
+.message-list-controls {
+  margin:$base_margin $base_margin*2;
+  spacing: $base_spacing;
+}
+
 // clear button
 .message-list-clear-button {
-  margin:$base_margin $base_margin*2;
   .button {
     @extend %button;
   }
diff --git a/js/ui/calendar.js b/js/ui/calendar.js
index 9f785e0b09..0bebbb5da2 100644
--- a/js/ui/calendar.js
+++ b/js/ui/calendar.js
@@ -3,10 +3,12 @@
 
 const { Clutter, Gio, GLib, GObject, Shell, St } = imports.gi;
 
+const GnomeSession = imports.misc.gnomeSession;
 const Main = imports.ui.main;
 const MessageList = imports.ui.messageList;
 const MessageTray = imports.ui.messageTray;
 const Mpris = imports.ui.mpris;
+const PopupMenu = imports.ui.popupMenu;
 const Util = imports.misc.util;
 
 const { loadInterfaceXML } = imports.misc.fileUtils;
@@ -1102,6 +1104,33 @@ class Placeholder extends St.BoxLayout {
     }
 });
 
+const DoNotDisturbSwitch = GObject.registerClass(
+class DoNotDisturbSwitch extends PopupMenu.Switch {
+    _init() {
+        super._init(false);
+
+        this._presence = new GnomeSession.Presence(
+            proxy => this._onStatusChanged(proxy.status));
+        this._presence.connectSignal('StatusChanged',
+            (proxy, sender, [status]) => this._onStatusChanged(status));
+    }
+
+    _onStatusChanged(status) {
+        this.setToggleState(status === GnomeSession.PresenceStatus.BUSY);
+    }
+
+    setToggleState(state) {
+        super.setToggleState(state);
+
+        if (!this._presence)
+            return;
+
+        this._presence.SetStatusRemote(state
+            ? GnomeSession.PresenceStatus.BUSY
+            : GnomeSession.PresenceStatus.AVAILABLE);
+    }
+});
+
 var CalendarMessageList = GObject.registerClass(
 class CalendarMessageList extends St.Widget {
     _init() {
@@ -1127,16 +1156,33 @@ class CalendarMessageList extends St.Widget {
         this._scrollView.set_policy(St.PolicyType.NEVER, St.PolicyType.AUTOMATIC);
         box.add_actor(this._scrollView);
 
+        let hbox = new St.BoxLayout({ style_class: 'message-list-controls' });
+        box.add_child(hbox);
+
+        hbox.add_child(new St.Label({
+            text: _('Do Not Disturb'),
+            y_align: Clutter.ActorAlign.CENTER,
+        }));
+
+        this._dndSwitch = new DoNotDisturbSwitch();
+        this._dndButton = new St.Button({
+            can_focus: true,
+            child: this._dndSwitch,
+        });
+        this._dndButton.connect('clicked', () => this._dndSwitch.toggle());
+        hbox.add_child(this._dndButton);
+
         this._clearButton = new St.Button({
             style_class: 'message-list-clear-button button',
             label: _('Clear'),
             can_focus: true,
+            x_expand: true,
             x_align: Clutter.ActorAlign.END,
         });
         this._clearButton.connect('clicked', () => {
             this._sectionList.get_children().forEach(s => s.clear());
         });
-        box.add_actor(this._clearButton);
+        hbox.add_actor(this._clearButton);
 
         this._placeholder.bind_property('visible',
             this._clearButton, 'visible',